diff --git a/dynasm/dasm_x86.lua b/dynasm/dasm_x86.lua
index 73502f63..7f536afa 100644
--- a/dynasm/dasm_x86.lua
+++ b/dynasm/dasm_x86.lua
@@ -1537,8 +1537,8 @@ local map_op = {
   vrcpss_3 =	"rrro:F30FV53rM|rrx/ood:",
   vrsqrtps_2 =	"rmoy:0Fu52rM",
   vrsqrtss_3 =	"rrro:F30FV52rM|rrx/ood:",
-  vroundpd_3 =	"rmioy:660F3AV09rMU",
-  vroundps_3 =	"rmioy:660F3AV08rMU",
+  vroundpd_3 =	"rmioy:660F3Au09rMU",
+  vroundps_3 =	"rmioy:660F3Au08rMU",
   vroundsd_4 =	"rrrio:660F3AV0BrMU|rrxi/ooq:",
   vroundss_4 =	"rrrio:660F3AV0ArMU|rrxi/ood:",
   vshufpd_4 =	"rrmioy:660FVC6rMU",